Water can leak into and out of structures. Reasons for this can be cracks, failed joints and even through permeable substrates. Once identified, if not treated, further problems can occur including the corrosion of reinforcement, thus resulting in the consequential loss of a usable area within the structure. Sika produce a range of resin injection systems designed to stop water ingress through leaks.
Damage can occur to the concrete in many ways but primarily through incorrect detailing, inadequate or untimely concrete compaction, or by accident. Sika produces a full range of concrete repair systems, which are compatible with all Sika waterproofing systems.
The terms “watertight” and “vapourtight” do not mean “crack-free”. Cracking can always occur in concrete in its plastic or in its hardened state, due to the stresses imposed. Sika has a complete range of products and systems for the repair of “cracks” and “honeycombing” in concrete structures.
Sealing and Waterproofing of Cracks and Voids
Closing, sealing and flexible bridging of leaking cracks and honeycombing or voids in new and existing structures:
Fast-foaming, low-viscous polyurethane injection foam for temporary water- stopping
Low-viscous, flexible polyurethane injection resin for permanent waterproof sealing
Two-component injection grout based on microfine cement
Waterproofing of Construction Joints
For sealing construction joints in a watertight structure, Sika provides a full range of products and systems:
Low-viscous, flexible polyacrylate injection resin with a high solids content
Low-viscous, flexible polyurethane injection resin for permanent watertight sealing even in wet conditions
Two-component injection grout based on microfine cement for waterproof sealing of voids and non-moving cracks in the structure
Surface Sealing and Waterproofing of Concrete Structures
Remedial surface sealing by curtain injection of surface defects in below ground concrete structures:
Flexible, very low-viscosity and very quick gelling polyacrylate injection gel for permanent watertight sealing. The material reacts to form a waterproof, flexible but solid gel with good adhesion to both dry and wet substrates.